Apparatus for cutting sheet material



4 ZZZ/527727 55522 51535527 U. C. HAREN APPARATUS FOR CUTTING SHEET MATERIAL Filed Feb. 17, 1950 May 15, I951 31 \ww 23 I Patented May 15, 1951 APPARATUS FOR CUTTING SHEET MATERIAL Urban 0. Haren, Akron, Ohio, assignor to The B. F. Goodrich Company, New York, N. Y., a corporation of New York Application February 17, 1950, Serial No. 144,637

6 Claims.

This invention relates to the trimming orotherwise cutting of sheet material to width and is especially useful in trimming sheet packing or flooring of vulcanized sheet rubber material as well as other sheet materials of plastics, compositions, textile fabrics or the like, to provide strips of uniform width.

In the manufacture of sheet material of rubber or other compositions for flooring or packing it 22, 23 are fixedto the respective screws 28, ii and are connected by a chain 24. A hand wheel 25 is fixed to screw The arrangement is such that the bearings I6 may be raised and lowered in unison.

For supporting the sheet material 26, a roll 2? is fixed to shaft 57. A pressure roll 28 is. fixed to shaft It to hold the sheet material against buckling during cutting thereof. Shafts I? and is necessary to trim the material to uniform l is hav gears 30, 3i and 32, 33 Secur d at their width. In such apparatus as has been proposed Opposite ends and meshing with each other for heretofore for accomplishing trimming of such moving the rolls in unison. sheet material as it is unwound from a roll and For driving the rolls, a sprocket 34 fixed to wound upon another, difiiculty has been experishaft H is driven from a convenient source of enced in holding the material to uniform width l power, such as a motor (not shown) by means due to the unstable manner of supporting the of a chain 35. knives or material one or both of which have been For cutting the sheet material a pair of paralobjectionably deflected during the cutting operalel rails 35, 31 are secured at their ends to the tion. roll-frames H, I2 and extend parallel to the roll It is an object of this invention to provide for 28. Collars 38, iii are slideably mounted on even trimming or other cutting operations, to bars 36, 3'! respectively and may he clamped provide stable mountings for the cutters, to prothereto by screws 38, 3Q. A knife bar 43 is advide for clamping of the material by rolling presjustably secured to collars Ml, 4| by screws sure applied close to the cutter, to provide ease 45 and supports a knife blade 45, such as a of adjustment for cutting different widths, and 5 razor blade, clamped th et b Screws A to provide for ready access of the cutting blades. second knife bar 50 is supported in similar man- These and other objects will appear from the nor by similar collars El from rails 36, 3?. As following description and the accompanying the knife bars are supported at their opposite drawings. ends from the rails 36, 3? the knife blades on the Of the drawings, knife bars are rigidly supported against deflec- Fig. 1 is a. front elevation of apparatus contion and may be adjusted along the rails to any structed in accordance with and embodying the desired spacing. invention, parts being broken away. For supporting the sheet material against Fig. 2 is an end elevation thereof. buckling, the roll 28 is built of sections which Fig. 3 is a sectional enlarged detail view of the 35 may be adjusted and assembled as desired. apparatus of Figs. 1 and 2. These roll sections may be set close to the knife Fig. 4 is a cross-sectional view taken on line bars and provide annular spaces therebetween 4-4 of Fig. 1. for clearing the knife blades and their clamping Referring to the drawings which show an emmeans. For this purpose, the roll 28 has two end bodiment of the invention, the numeral l0 dessections 55, 56 each comprising a hub 51, a radial ignates a base or support on which are mounted flange 58 and a rim band 59. The hubs have a pair of spaced apart roll-frame members ll, keyways for engaging keys 60 secured to the 12. These frame members are slotted vertically shaft and are secured by set screws 6!, the hubs to receive roll bearings l3, l4, l5, IS. The roll extending outwardly of the roll for access to bearings l3, I4 are seated at the bottoms of the their set screws. The rim band 59 overhangs the slots and rotatably support a roll shaft IT. The flanges 58 to provide annular clearance space bearings l5, l6 are slideably mounted in the slots for the knife blade 46 and its clamping means for adjustment and rotatably support a roll shaft beyond which the face of the roll overhangs. IS. The center section of the roll comprises a For adjusting the upper roll toward and from 50 series of hubbed pulleys 53, 54 distributed at the lower roll, a cap-plate I9 is fixed to the tops spaced-apart intervals along the shaft and adof the roll frames. Adjusting screws 2!], 2| are justably secured to the shaft by set screws. threaded to engage the threads of vertical open- These pulleys support stave members 62, 63, B4, ings in the cap-plate and their lower ends are which are secured to the faces of the pulleys by rotatably secured to bearings l5, l6. Sprockets 55 screws 65. Staves of different lengths are supthe pulleys to provide supporting faces of different lengths between the knife blades. The staves 62 and 64 may be relatively short so that they may remain in place permanently while the staves 63 are removed and replaced by staves of different lengths when trimming difierent widths of material. The overhang of the pulleys permits adjustment of the roll face close to the lines of cut to support the material close to the cut.

The roll 21 is covered with rubber or other material as at 68 to support the sheet material to be cut and permits setting of the knives so as to out entirely through the material, the covering of the roll protecting the knives from being dulled by contact with the metal roll. 7

The sheet material is delivered to the cutting mechanism from a supply thereof and under a guide roll 66 supported from frame members Ii, i2 by brackets 61. After passing between rolls 21, 28 where the material is trimmed to width it is rewound on suitable rewinding mechanism (not shown).

The invention provides for supporting the trimming knives rigidly in the desired spaced-apart relation and permits holding and steadying the material between the rolls at both sides of and close to each knife.

Variations may be 'made without departing from the scope of the invention as it is defined by the following claims.

I claim:

1. Apparatus for cutting sheet material, said apparatus comprising a pair of cooperating pressure rolls, means for driving the rolls, one of said rolls comprising axially spaced-apart roll sections adjustable axially of the roll, at least one of said roll sections comprising a pair of head members and removable staves connecting said head members, cutting knives independently supported between said roll sections for contact with the ppositeroll at positions between the roll sections,

,and supports extending along the rolls at each side thereof for adjustably securing the knives.

2. Apparatus for cutting sheet material, said apparatus comprising a pair of cooperating pressure rolls, means for driving the rolls, one of said rolls comprising axially spaced-apart roll sections adjustable axially of the rolls, said sections having annular ciearanee pockets at their ends for clearing cutters, stationary cutters located in said pockets and supported by bars extending between said roll sections, and means for adjustably supporting said bars.

3. Apparatus for cutting sheet material, said apparatus comprising a pair of cooperating presing cutters, stationary cutters located in said pockets and contacting the opposite roll through a space between said overhanging faces, bars extending between the roll sections for supporting said cutters, and means at each side of the rolls for adjustably supporting the ends of said bars.

4. Apparatus for cutting sheet material; said apparatus comprising a pair of cooperating pressure rolls, roll-driving means, one of said rolls comprising axially spaced-apart sections, a clear ance pocket between said sections, supports at each side of the rolls, a bar secured to said supports and extending between the roll sections, and a cutting knife supported on said bar between the roll sections within said pocket and extending outwardly of the roll between said roll sections 'toengage material between said rolls.

5. Apparatus for cutting sheet material; said apparatus comprising a pair of cooperating pressure rolls, roll-driving means, one of said rolls comprisingaxially spaced-apart sections adjust able axially of the roll, said sections having clearance pockets at their ends for clearing cutters, supports at each side of the rolls, bars adjustably secured at opposite ends thereof to said supports and extending between ends of the roll sections, and cutting knives supported on said bars within said clearance pockets and extending outwardly of the roll between said roll sections to engage material between said rolls. i 6. Apparatus for cutting sheet material, sai apparatus comprising a pair of cooperating pressure rolls, means for driving said rolls, one of said rolls comprising axially spaced-apart sec tions adjustable axially of the roll, said sections having roll faces overhanging their opposed ends in closely spaced relation for supporting material close to a cutter, supports for cutters extending parallel to the rolls at each side thereof, a bar adjustably secured at opposite ends thereof to said supports, and extending through the space between said roll sections, and a cutter secured to said bar between said sections interiorly of the overhanging faces and extending outwardly thereof toward the face of the opposite roll.

URBAN C. HAREN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Great Britain Sept. 80, 1920 

